So why the offer now? Did Stanford and UCLA jumping-in make them rethink? Did they figure they had more time to mull things over and the new offers made it a now or never deal? Still trying to figure-out where they'd put him? Where trying to decide whether to offer greyshirt or immediate? My guess is it's a combination of 2 and 3.
My educated guess is it went down this way:
1) We wanted him on the team and the staff knew that.
2) They suspect that some members of the 2010 class that are now RS Juniors will play this year, graduate, and call it good and not play in 2014.
3) The staff didn't really want to take that gamble right away, so they slow-played Harrison figuring that we would be able to offer in October and have him accept then.
4) Stanford and UCLA offering forced our hand.